Acid Activation of Natural Zeolite with High Content of Iron Oxides in Creation of Selective Sorbents and CatalystsKairat Kadirbekov, Dauren Zhambakin, Almaz Kadirbekov and Kylysh ImanbekovMATEC Web Conf., 96 (2017) 00002DOI: https://doi.org/10.1051/matecconf/20179600002